comedian stephen colbert tells congress about his day as a migrant farm worker. >>> the military special ops weather team in action. a critical unit when war depends on the battlefield forecast. >> what does this have to do with weather? >> well, you have to be alive to report the weather. >>> and home, after more than a year in an iran prison, sarah shourd sits down today with cnn. >> nothing in life can prepare you for something like this. >>> good morning, everyone. i'm don lemon. tony is off today. those stories and your comments right here right now in the cnn newsroom. >> but, up first, mr. colbert goes to washington. comedy central funny man stephen colbert brings his spin to serious issues, farm labor and immigration. he testified momenting ago before a congressional subcommittee. here's his take on a day spent picking beans. >> i started my work day with preconceived notions of migrant work, but after working with these men and women picking beans, packing corn for hours on end side by side in the unforgiving sun i have to say, and i do this sincerely, please don't make me do th